class_docstr: Tests migrate DB job.
code: def test_job_ttl_after_finished_nil(self):
      docs = render_chart(
          values={
              "migrateDatabaseJob": {"ttlSecondsAfterFinished": None}
          },
          show_only=["templates/jobs/migrate-database-job.yaml"],
      )
      spec = jmespath.search("spec", docs[0])
      assert "ttlSecondsAfterFinished" not in spec
  
imports: from __future__ import annotations
  import jmespath
  import pytest
  from tests.charts.helm_template_generator import render_chart
label_desc: Use image node_id 16 for calling the TestMigrateDatabaseJob obj's underlying member method code with example usage: obj.test_job_ttl_after_finished_nil() without return types